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寻找油气的地球化学方法,主要是基于油气藏发散出来的气体和低分子量的烃类,以某种方式运移到表层土壤这一众所周知的事实。 事实上,在石油勘探历史的早期,人们利用油、气苗就已在世界上找到了许多大油田。当可见的油气苗变得不显著时,则需借助新技术以检测油气的微渗出量及表层土壤中由烃类引起的化学、物理和微生物的效应。30多年来己有多种寻找油气藏上方地面油、气痕迹的地球化学新方法得到了广泛应用。
The geochemical methods of looking for oil and gas are mainly based on the well-known fact that gas and low molecular weight hydrocarbons from the reservoir are somehow transported to the surface soil. In fact, early in the history of oil exploration, people used oil and gas to find many large oil fields in the world. When visible oil and gas spills become insignificant, new techniques are needed to detect the micro-exudation of hydrocarbons and the chemical, physical, and microbial effects of hydrocarbons in surface soils. Over the past 30 years, there have been many new geochemical methods for searching for oil and gas traces on the surface of oil and gas reservoirs and have been widely used.